JP5839030B2 - スケール抑制方法及び地熱発電装置 - Google Patents
スケール抑制方法及び地熱発電装置 Download PDFInfo
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- JP5839030B2 JP5839030B2 JP2013510917A JP2013510917A JP5839030B2 JP 5839030 B2 JP5839030 B2 JP 5839030B2 JP 2013510917 A JP2013510917 A JP 2013510917A JP 2013510917 A JP2013510917 A JP 2013510917A JP 5839030 B2 JP5839030 B2 JP 5839030B2
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- 238000000034 method Methods 0.000 title claims description 29
- 230000001629 suppression Effects 0.000 title claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 154
- 150000001767 cationic compounds Chemical class 0.000 claims description 92
- 229910001411 inorganic cation Inorganic materials 0.000 claims description 92
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 61
- 239000002455 scale inhibitor Substances 0.000 claims description 45
- 239000000377 silicon dioxide Substances 0.000 claims description 29
- 238000010248 power generation Methods 0.000 claims description 26
- 238000004519 manufacturing process Methods 0.000 claims description 25
- 238000001556 precipitation Methods 0.000 claims description 23
- 238000003860 storage Methods 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- -1 iron ion Chemical class 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 13
- 150000003839 salts Chemical class 0.000 claims description 13
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 12
- 229910001424 calcium ion Inorganic materials 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 9
- 150000001768 cations Chemical class 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 238000001704 evaporation Methods 0.000 claims description 5
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims description 3
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 2
- 230000020169 heat generation Effects 0.000 claims 2
- 239000008400 supply water Substances 0.000 claims 1
- 239000002738 chelating agent Substances 0.000 description 17
- 239000000243 solution Substances 0.000 description 17
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 15
- 239000011575 calcium Substances 0.000 description 15
- 229910052791 calcium Inorganic materials 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000002244 precipitate Substances 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- GXDHCNNESPLIKD-UHFFFAOYSA-N 2-methylhexane Natural products CCCCC(C)C GXDHCNNESPLIKD-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910052925 anhydrite Inorganic materials 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 229910001410 inorganic ion Inorganic materials 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000010979 pH adjustment Methods 0.000 description 2
- 238000001139 pH measurement Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- 208000018208 Hyperimmunoglobulinemia D with periodic fever Diseases 0.000 description 1
- 206010072219 Mevalonic aciduria Diseases 0.000 description 1
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- ABBZJHFBQXYTLU-UHFFFAOYSA-N but-3-enamide Chemical compound NC(=O)CC=C ABBZJHFBQXYTLU-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- ZADYMNAVLSWLEQ-UHFFFAOYSA-N magnesium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[Mg+2].[Si+4] ZADYMNAVLSWLEQ-UHFFFAOYSA-N 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- MSSNHSVIGIHOJA-UHFFFAOYSA-N pentafluoropropane Chemical compound FC(F)CC(F)(F)F MSSNHSVIGIHOJA-UHFFFAOYSA-N 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N sec-butylidene Natural products CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- DTXLBRAVKYTGFE-UHFFFAOYSA-J tetrasodium;2-(1,2-dicarboxylatoethylamino)-3-hydroxybutanedioate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)C(O)C(C([O-])=O)NC(C([O-])=O)CC([O-])=O DTXLBRAVKYTGFE-UHFFFAOYSA-J 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/04—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/30—Geothermal collectors using underground reservoirs for accumulating working fluids or intermediate fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/001—Upstream control, i.e. monitoring for predictive control
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
- C02F2209/006—Processes using a programmable logic controller [PLC] comprising a software program or a logic diagram
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/083—Mineral agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
Description
生産井から採取した地熱水の流量と、2価以上の無機陽イオン濃度を計測する流入水計測工程と、
前記地熱水の熱を除去する熱除去工程と、
前記熱除去工程後の地熱水の温度及びpHを計測する流出水計測工程と、
前記熱除去工程後の地熱水の温度及びpHに基づいて、前記熱除去工程後の地熱水の無機陽イオンの飽和濃度を求め、前記流入水計測工程で測定した前記地熱水の無機陽イオン濃度から前記熱除去工程後の地熱水の無機陽イオンの飽和濃度を引いた値と、前記地熱水の流量とから、前記無機陽イオンを含む塩の析出を抑制するために必要なスケール抑制剤の添加量を演算するスケール抑制剤添加量演算工程と、
前記スケール抑制剤添加量演算工程で演算されたスケール抑制剤の添加量に基づいて、前記生産井から採取した地熱水にスケール抑制剤を添加するスケール抑制剤添加工程とを含むことを特徴とする。
生産井から採取される地熱水中の2価以上の無機陽イオン濃度を測定する無機陽イオン濃度測定装置と、
前記生産井から採取される地熱水の流量を測定する流量計と、
前記地熱水の温度を低下させる熱除去部と、
前記熱除去後の地熱水の温度を測定する温度計と、
前記熱除去後の地熱水のpHを計測するpH測定装置と、
前記熱除去部で温度を低下させた後の地熱水の温度及びpHに基づいて、前記熱除去部で温度を低下させた後の地熱水の無機陽イオンの飽和濃度を求め、前記無機陽イオン濃度測定装置で測定した前記地熱水の無機陽イオン濃度から前記熱除去部で温度を低下させた後の地熱水の無機陽イオンの飽和濃度を引いた値と、前記地熱水の流量とから、前記無機陽イオンを含む塩の析出を抑制するために必要なスケール抑制剤の添加量を算出する演算処理部と、
前記地熱水に、前記演算処理部で算出された量のスケール抑制剤を添加する制御部とを備えていることを特徴とする。
11 セパレータ
12 第1タービン
13 第1発電機
17 媒体蒸発器
18 第2タービン
19 第2発電機
20 媒体凝縮器
21 ポンプ
22 無機陽イオン濃度計
23 シリカ濃度計
24 アルカリ剤タンク
25 ポンプ
26 キレート剤タンク
27 ポンプ
28 演算処理部
29 キレート剤添加量制御部
30 流量計
31 温度計
32 pH計
33 記憶装置
34 入力装置
40 飽和濃度測定装置
41 溶液貯留部
42 温度制御部
43 溶液採取部
44 pH調整部
44a pH測定部
44b 酸アルカリ添加部
45 陽イオン濃度計測部
45a タイマ
Claims (11)
- 生産井から採取した地熱水の流量と、2価以上の無機陽イオン濃度を計測する流入水計測工程と、
前記地熱水の熱を除去する熱除去工程と、
前記熱除去工程後の地熱水の温度及びpHを計測する流出水計測工程と、
前記熱除去工程後の地熱水の温度及びpHに基づいて、前記熱除去工程後の地熱水の無機陽イオンの飽和濃度を求め、前記流入水計測工程で測定した前記地熱水の無機陽イオン濃度から前記熱除去工程後の地熱水の無機陽イオンの飽和濃度を引いた値と、前記地熱水の流量とから、前記無機陽イオンを含む塩の析出を抑制するために必要なスケール抑制剤の添加量を演算するスケール抑制剤添加量演算工程と、
前記スケール抑制剤添加量演算工程で演算されたスケール抑制剤の添加量に基づいて、前記生産井から採取した地熱水にスケール抑制剤を添加するスケール抑制剤添加工程とを含むことを特徴とするスケール抑制方法。 - 前記生産井から採取した地熱水と同様なシリカ濃度及びpHで、前記無機陽イオン濃度を少しずつ増加させた試料水をそれぞれ作成し、
前記各試料水を前記熱除去工程後の温度に所定時間保持した後、各処理水中の前記無機陽イオン濃度を測定し、
前記試料水の無機陽イオン濃度よりも前記処理水の無機陽イオン濃度が最初に低くなるときの試料水の濃度を前記飽和濃度とする請求項1に記載のスケール抑制方法。 - 前記無機陽イオンが、マグネシウムイオン、カルシウムイオン、2価の鉄イオン、3価の鉄イオン及びアルミニウムイオンから選ばれる一種以上である請求項1に記載のスケール抑制方法。
- 前記地熱水のpHを9以上に調整する請求項1〜3のいずれか1つに記載のスケール抑制方法。
- 前記地熱水に、前記スケール抑制剤の添加と同時又は前記スケール抑制剤の添加後に、アルカリ剤を添加してpHを9以上に調整する請求項4に記載のスケール抑制方法。
- 前記熱除去工程は、前記地熱水を減圧し、水蒸気を取出すフラッシュ工程及び/又は前記地熱水から熱を回収して発電媒体を蒸発させる工程を含む請求項1に記載のスケール抑制方法。
- 前記生産井から採取した地熱水を気液分離し、気液分離後の蒸気を発電設備に供給し、気液分離後の地熱水を前記熱除去工程に送る、請求項1に記載のスケール抑制方法。
- 生産井から採取される地熱水中の2価以上の無機陽イオン濃度を測定する無機陽イオン濃度測定装置と、
前記生産井から採取される地熱水の流量を測定する流量計と、
前記地熱水の温度を低下させる熱除去部と、
前記熱除去後の地熱水の温度を測定する温度計と、
前記熱除去後の地熱水のpHを計測するpH測定装置と、
前記熱除去部で温度を低下させた後の地熱水の温度及びpHに基づいて、前記熱除去部で温度を低下させた後の地熱水の無機陽イオンの飽和濃度を求め、前記無機陽イオン濃度測定装置で測定した前記地熱水の無機陽イオン濃度から前記熱除去部で温度を低下させた後の地熱水の無機陽イオンの飽和濃度を引いた値と、前記地熱水の流量とから、前記無機陽イオンを含む塩の析出を抑制するために必要なスケール抑制剤の添加量を算出する演算処理部と、
前記地熱水に、前記演算処理部で算出された量のスケール抑制剤を添加する制御部とを備えていることを特徴とする地熱発電装置。 - 前記熱除去部の前段に、気液分離器が配置され、気液分離後の地熱水を前記熱除去部に導入するように構成されている、請求項8に記載の地熱発電装置。
- 前記熱除去部は、放熱する配管、減圧により地熱水から蒸気を取出すフラッシャー及び発電媒体に熱を与えて発電媒体を蒸発させる熱交換器、から選ばれる1種以上である請求項8に記載の地熱発電装置。
- 試料水を貯留する溶液貯留部と、
この溶液貯留部に貯留された試料水の温度を調整する温度制御部と、
前記溶液貯留部に貯留された試料水に酸又はアルカリを添加して、pHを調整するpH調整部と、
所定時間経過後に試料水中の2価以上の無機陽イオン濃度を測定する濃度計測部と、
試料水として前記無機陽イオン濃度を徐々に高めたものを作成して順次、前記溶液貯留部に流入させる溶液供給部とを有する無機陽イオンの飽和濃度測定装置を備えている請求項8〜10のいずれか1つに記載の地熱発電装置。
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